CD,
The term spring steel refers to a group of medium-to-high carbon, low alloy steel products which exhibit excellent yield strength. The term yield strength refers to a material's ability to endure significant bending or twisting and return to its original shape without deforming. Spring steel stock alloys typically include silicone in their composition and are hardened and cold rolled after casting to improve yield strength. Spring steel products are generally either cold drawn as wire or punched from flat stock. Typical uses include saw blades, tape measures, helical springs, and vehicle suspension elements.
Spring steel alloys feature the unique characteristic of being able to withstand considerable twisting or bending forces without any distortion. Products made from these steel alloys can be bent, compressed, extended, or twisted continuously, and they will return to their original shape without suffering any deformation. This characteristic is defined as a high yield strength and is the result of the specific composition and hardening of the steel alloy. Spring steels are medium-to-high carbon content alloys generally featuring a carbon content of 0.5 to 1.0 percent. The other alloy additives typically include manganese and silicone with silicone being the key component in high yield strengths.
So YES Spring Steel Is a Good Blade material and a addition of wrought iron would make a significant showing in the patten in pattern welded steel (AKA Damascus) However you failed to identified the type of Spring steel you intend to use ... IE Leaf spring , Ultra High Carbon Spring Steel , or Such So with out knowing what you are specifically speaking of it is hard to give you the correct response .
Samuel